--- title: AdBlue in a Diesel Tank Claggan: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/claggan-highland/ location: Claggan county: Highland latitude: 56.822170 longitude: -5.086680 service: AdBlue in a Diesel Tank updated: 2026-10-01 --- # Why It Occurs and How to Avoid It: AdBlue in a Diesel Tank in Claggan AdBlue already in your diesel tank? In that case set this page down for now, keep the ignition and engine off, then call 0333 366 0103. Usually, when your engine hasn't turned, it is emptied and thoroughly rinsed where the vehicle sits around Claggan. Not happened yet? Below, the page covers the why it occurs and the how to avoid it altogether. ## AdBlue in a diesel car: two tanks, two fillers Diesel feeds your engine — yet many newer diesels driven round Claggan and Caol hold a second fluid too. Stored in a tank of its own, AdBlue is fed into the exhaust stream and cleans it. There is a filler for each tank. Under one flap, next to each other: that is the arrangement on many vehicles. On others, AdBlue's filler sits beneath the bonnet or in your boot instead. The diesel side is topped up at the pump all the time. Much less frequently, the AdBlue side is filled — normally from a bottle, by a person thinking about where it goes. That gap is where the slip lives. ## How AdBlue in the diesel tank happens in Claggan Carelessness rarely causes it. Instead is three things coming up at once. On a drive off Carn Dearg Road before work, or in the car park at Railway Social Club on the way home: that is where the rushed top-up takes place. Why the rush? As AdBlue gets low the vehicle tells you, and if it's empty, limp mode follows. Then the car is strange. A hire car, a new car or a company car puts the fillers where your last one didn't, and your hand gets to for the cap it would have used on the old one. No part stops the tip after it has started, since a bottle with a spout goes into a diesel filler as readily as an AdBlue one. The bottle fits. The same few seconds settle it, in the middle of Claggan or out in Inverlochy. ## The AdBlue filler and the diesel filler: telling them apart Whether a Claggan forecourt or a driveway over in Camaghael, take a couple of seconds on these before anything goes in. - The cap. The AdBlue cap is often blue, or marked "AdBlue". The diesel cap usually isn't. Read it instead of going by where it sits. - The size. On many vehicles the AdBlue filler neck is the smaller of the two. - A label inside your fuel flap often says which fuel goes where, on many cars. Check for it. - The handbook says where it lives when the filler is not next to the diesel cap: your boot, or under the bonnet. - The person who drove the car last. On a hire or company car picked up from somewhere like the car park outside Fort William, ask before you leave, not when the light comes on. ## Topping up AdBlue without it reaching your diesel tank On the day the light appears — anywhere you are around Highland — a routine to use. - Not in a rush on the side of Claggan Road, not on a slope, not with the engine running: park then switch off first. - Say "AdBlue" out loud as you unscrew the cap, once you find the AdBlue filler and read it. Silly, yes, yet it works. - The two behind one flap? Then make sure the cap on your diesel filler is still closed before raising the bottle. - Tip slowly, using the bottle's own spout. Stop when it is full or when the bottle is empty. - Shut the cap, then look once more — confirm the diesel cap stayed shut throughout. Only then, start the vehicle. Discover during the second or third step that AdBlue went into the diesel filler? That is where you stop. Step five is out. ## Claggan: already put AdBlue in the diesel tank? The short order of things, beginning with no starting the motor. The fuel pump runs on many diesels the moment your ignition goes on — and so leave it off. Thinning it with more diesel fails, since AdBlue settles to the bottom rather than mixing — and that is where the fuel is pulled from. If you are at a forecourt, whether it is the Gleaner or the Morrisons, ask the attendants to help roll the car away from the pump. Your own driveway around Claggan is the place it stays. Stop as soon as it is safe and switch off, if the engine has already run. The next exit means where to come off when you are on the M9, over 50 miles from Claggan. Mileage matters — a short hop across Claggan is a smaller job than heading over 50 miles towards Inverness — so say about how far it went. ## Our arrival in Claggan, and what takes place next Anywhere the vehicle has stopped, whether outside the local primary school, near Ben Nevis War Memorial Plaque or at home, our van travels to it. Both the work and our quote rest on three answers — which liquid, what quantity, and if it's run — so our engineers ask. You get that price on the phone, before anyone sets off. Emptying your tank comes next, then a thorough flush of your system. AdBlue crystallises and is corrosive to some of the metals in a fuel system, so it doesn't wash out on its own — which is why the flush matters more with AdBlue than with petrol. Filter flushed or, if it must be, replaced; clean diesel in; then a test of the vehicle. Before leaving, we fire it up and make sure that it's running smoothly. With pumps fine on a busy forecourt and quiet enough for use outside a house at night, most jobs in which your engine hasn't run take about half an hour after our technicians are there. No money in advance; you settle up that day. At the end, a VAT invoice and the report from the engineer go to you for the insurer. It is worth checking your insurance as the van travels to you: misfuelling cover comes with many policies. ## About Claggan and where it is Claggan is a small suburban area situated on the coast of Highland, Scotland, with a population of around 1499 people. Claggan sits at an elevation of 15 metres, looking out over the surrounding coastline. Claggan is characterized by its semi-detached housing and is located near other communities such as Inverlochy and Lochyside. Claggan is also within driving distance of the city of Inverness, which is approximately 55.7 miles away. ## AdBlue drains across Highland, Claggan included As a residential suburb, Claggan shares its vans surrounding places — Fort William, Lochyside — right across PH postcodes and the surrounding area beyond. Our van reaches you fastest with a postcode starting PH33 6. No need to shift your car. A driveway, a lay-by on the way to Field of Hope Fort William, a side street close to An Drochaid: our technicians drain the car where it is. If you're near a border, or somewhere hard to describe like the back of Claggan Park, ring and ask rather than guessing. ## In short, for Claggan people Before you tip, read the cap. If AdBlue has gone in the diesel tank all the same, leave the vehicle off then ring 0333 366 0103. Petrol in Diesel drains it where it sits, anywhere around Highland.